Increasing the width of tires for a 2015 GS350 F Sport RWD: Need Advice
 

Wow, 120+ views with no advice so far. Maybe this is more difficult of an issues than I realized.

There is no problems running at most one size up. I have done this to my previous cars to add extra contact patch to my tires. This will increase grip but make the car ride slightly mushy/soft if that makes sense. Its better to go with oem size. But 1 size up wont hurt nothing.

Thanks for the input. I would rather stay with the OEM sizes, but as stated in the initial post, no one seems to manufacture All Season tires in those sizes. So, I am looking to change sizes.

I'm in the marking for the tires and did find Dunlop, Pirelli, Michelin, Yokohama and many more in 235/40/19 all weather tires.

Roger that, but at the same time, the OEM size for my rear tires are 265/35/19. I have been unable to find any matching sets of All Season tires in the two different OEM sizes for my front (235/40/19) and my rear (265/35/19). Rather than running different brands of tires front to rear, I am considering going to 245 front and 275 rear. With those two sizes, several manufacturers make matching sets of All Season tires.

Go for the Michelin Pilot AS/3's. Ive been running them for 15,000 miles so far and theyre fantastic. I live in atlanta and i've driven them in a few freezing temp situations and they do great. Great wet handling too.

245/40/19 fronts and 275/35/19 rears. I paid 1370 all four with replacement certificates at discount tire. The rears have 6 treads while the fronts have 5. No biggie, actually looks cool...:thumbup:

One thing ive noticed with going with slightly larger tires and not the factory bridgestones is the ride becomes slightly softer and theres more give/roll in the steering. But the benefits (overall handling and ride comfort) outweigh that aspect. In sport + mode it feels fantastic.:D

What i've been reading are that Continental DWS06 are the best tire for all season performance.

According to a review conducted by "The Tire Rack", the Michelin Pilot Sport AS3 provides sportier handling than the Continental DWS06, but the Continental wins if you prefer a nicer ride. When the time comes, if none of the manufactures are making All Season tires in the staggered OEM sizes of my particular car, I will likely go with shiveng's recommendation of the increased width tires (245 front / 275 rear) and the Michelin Pilot Sport AS3.

The Continental DWS06 comes in the 245/40-19 (front) and 265/35-19 (rear). I would give them a try and let us know how it goes. That is probably what I am going to put on when I need tires.

I am getting the Bridgestone pole position S04 with the wider size 245/40/19, I had new Brigestone Rft's in the back and I wanted to keep the same brand going.

If you go with 245/40-19 front and 275/35-19 rear, it maintains the same overall diameter difference of the OEM tire sizes. The OEM rear tires are about 1/10th of an inch lower in overall diameter. If you go with 245/40 in the front without an equal increase to the rear, it is possible that the car's "nanny devices" could incorrectly interpret the decreased revolution speed of the taller front tire vs the OEM height rear tires as loss of traction in the rear.
I have corresponded with two people on this forum that claim they have experienced no adverse effects with 245/40 front and 275/35 rear. After some of my readings on this forum, I would hesitate to go 245/40 front with no corresponding increase to the rears.

I increased the tire size over OEM and went with 245/40/19 fronts and 275/35/19 rears, Continental ExtremeContact DW. Very, very comfortable, great ride quality, no harshness and very good in wet weather. About $950 OTD at Discount Tire.

I'm trying to recall but did you lower your car?

Islandbeef, I plan to put All Season tires on my RWD 2015 GS350 F Sport when the current OEM tires need to be replaced. Because no one currently makes All Season tires in the OEM sizes for the staggered sizes, I will use the same sizes tires that you currently have on your car. Have you experienced any adverse effects from the slight wider and taller tires?